/* Header */
.header {
    height: var(--header-height);
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
}

.header-content {
    width: 100%;
    max-width: 100%;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex: 1;
}

/* Header menu button - now hidden, filter button is in topology header */
.header-menu-btn {
    display: none;
}

@media (max-width: 768px) {
    .header-content {
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }

    .header-left {
        gap: var(--spacing-lg);
        align-items: center;
    }
}


.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 0;
}

.logo-svg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    color: var(--gray-800);
}

.logo-svg svg {
    width: 100%;
    height: 100%;
    display: block;
}

@media (max-width: 768px) {
    .logo h1 {
        font-size: 1.125rem;
    }
}

.logo-img {
    width: 56px;
    height: 56px;
    border-radius: 6px;
    object-fit: contain;
    object-position: center;
    display: block;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.header-nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    color: var(--gray-600);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .header-right {
        gap: var(--spacing-md);
    }
    
    .user-details {
        display: none;
    }
}

/* User Info */
.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-details {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
}

.user-name {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.875rem;
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--gray-200);
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    padding: 0;
}

.user-menu-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.user-avatar {
    display: block;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    min-width: 180px;
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    text-decoration: none;
    color: var(--gray-700);
    transition: var(--transition-fast);
    font-size: 0.875rem;
    border-radius: 8px;
    margin: 4px 6px;
}

.dropdown-item--button {
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font: inherit;
    cursor: pointer;
}

.dropdown-item--button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.dropdown-item:hover {
    background: var(--gray-50);
    color: var(--primary-color);
}

.dropdown-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.dropdown-item:hover .dropdown-icon {
    color: var(--primary-color);
}

.dropdown-icon img {
    display: block;
    width: 20px;
    height: 20px;
    opacity: 0.85;
}

.dropdown-label {
    flex: 1;
}

.dropdown-icon svg {
    display: block;
    width: 20px;
    height: 20px;
}

.dropdown-divider {
    height: 1px;
    margin: 0 var(--spacing-md);
    background: var(--gray-200);
}

/* Theme Toggle - Minimalist Pill Design */
.theme-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 6px 12px;
}

.theme-section-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-500);
    margin-bottom: 8px;
}

.theme-toggle-pill {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    background: var(--gray-100);
    padding: 4px;
    border-radius: 24px;
    border: 1px solid var(--gray-200);
    width: calc(100% - 12px);
    box-sizing: border-box;
}

.theme-toggle-track {
    position: absolute;
    top: 4px;
    left: 4px;
    right: 4px;
    bottom: 4px;
    pointer-events: none;
}

.theme-toggle-thumb {
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.theme-toggle-pill[data-active="dark"] .theme-toggle-thumb {
    transform: translateX(100%);
}

.theme-toggle-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    border-radius: 20px;
    border: none;
    background: transparent;
    color: var(--gray-400);
    cursor: pointer;
    transition: color 0.2s ease;
    position: relative;
    z-index: 1;
}

.theme-toggle-btn:hover {
    color: var(--gray-600);
}

.theme-toggle-btn.active {
    color: var(--primary-color);
}

.theme-toggle-btn svg {
    display: block;
    width: 18px;
    height: 18px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn.active svg {
    transform: scale(1.1);
}

.theme-toggle-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

@media (max-width: 768px) {
    .user-details {
        display: none;
    }

    .user-dropdown {
        right: 8px;
        min-width: 180px;
        padding: 8px;
        border-radius: 16px;
    }

    .theme-section {
        padding: 4px 4px 10px;
    }

    .theme-toggle-pill {
        padding: 3px;
        border-radius: 20px;
    }

    .theme-toggle-btn {
        padding: 6px 10px;
    }

    .theme-toggle-btn svg {
        width: 16px;
        height: 16px;
    }

    .dropdown-item {
        padding: 12px 16px;
        margin: 2px 4px;
        border-radius: 10px;
        font-size: 0.9rem;
    }
}